SYNOPSIS or BEITISH MOSSES. 11 



Fam. 1. Phascse. 



St. simple or divided^ rarely with innovations. L. 

 generally papillose at back. Monoiopus. Antheridia 

 enclosed or naked in axils of upper leaves. Caps, 

 globose, ovate, ovate-acuminate or obliquely rostrate, 

 either with or without a columella, immersed or ex- 

 serted. Calyptra cucullate or many-lobed. 

 a. Columella absent. 



30. Ephemerella, Muell. L. densely chlorophyllose, 

 cells dense, rectangular above, elongate, rhomboid, 

 hyaline at base. Caps, subspherical, immersed, va- 

 ginula cylindric. Spores reniform, brown, granulose. 



h. Columella present. 



31. Microbryum, Schjp. Minute, ceespitose, gemmi- 

 form. L. dense celled, nerve solid, minutely papillose 

 on back at apex. Antheridia naked, axillar. Caps, 

 ovate, erect, slightly exserted. Calyptra large, erect, 

 many-lobed, deeply slit on one side. 



32. Sphserangium, 8chp. Minute, gemmiform, gre- 

 garious. L. scariose, very concave, ovate, or obovate, 

 nerved, minutely papillose on both sides at apex, cells 

 large, only slightly chlorophyllose. Antheridia en- 

 closed in minute gemmiform perigonial leaves. Caps, 

 more or less immersed, erect, or subpendulous, 

 spherical. Calyptra erect, small, mitriform. Colu- 

 mella thick. Spores largish, round, finely granulose. 



33. Phascum, Linn. PI. more robust. St. simple, 

 bi- or tripartite. L. broad or ovate-lanceolate, solid, 

 nerved, apical cells dense, quadrate-hexagonal, basal 

 hexagono-r octangular, hyaline, minutely papillose. 

 Antheridia enclosed. Caps, more or less exserted, 

 subglobose, ovate, or ovate-oblong, with an obtuse 



